As of 2025, Steam reports that over 25% of the top 1000 games still use DirectX 9 (primarily indie games and older MMOs). Microsoft has stated they will keep the legacy runtime available via the "Games for Windows" offline installer (the June 2010 Redist) indefinitely.
However, there is a shift towards DXVK (DirectX to Vulkan translation) on Linux, which is now being used on Windows to play DX9 games without Microsoft's runtime. But for native compatibility, the "DirectX 9.0c extra files x86 x64" remain the gold standard.
⚠️ Important: Do not download “DirectX 9.0c” from third-party DLL sites. Only use Microsoft’s official link.
This feature is particularly distinct when looking at the architecture tags (x86 vs x64):
d3dx9_xx.dll.DirectX is a collection of APIs designed to handle tasks related to multimedia, particularly game programming and video rendering on Microsoft Windows platforms. It acts as a bridge between software and hardware, allowing developers to access hardware components like GPUs (Graphics Processing Units), sound cards, and other peripherals directly. This direct access enables more efficient and powerful rendering of graphics and sound, which is critical for gaming and high-end graphics applications.
On modern Windows 10/11, DirectX 9.0c is not fully installed by default. Microsoft ships a shim layer, but many old games still demand specific DLL versions. The correct solution is to run the official directx_Jun2010_redist.exe.
However, that official installer sometimes refuses to run (“a newer version is already installed”) even when d3dx9_43.dll is missing. In that niche scenario, advanced users manually extract the CABs and copy the two missing DLLs – which is where “extra files x86/x64” packs appear useful.
The "extra files" feature created a unique problem for gamers and IT administrators:
Open Command Prompt as Admin:
You should almost never download individual DLLs from "DLL download sites" (these are often malicious or outdated). Instead, get the official Microsoft redistributable.